CN115039291A - Connector with a locking member - Google Patents

Abstract

The movable arm portion is prevented from becoming difficult to flex. The connector includes: a male housing (10) which can be fitted to the female housing (40); a seal ring (15) which is fitted to the inner peripheral surface of the male housing (10) and seals the space between the seal ring and the outer peripheral surface of the female housing (40); a movable arm section (30) which is formed on the male housing (10) and is capable of elastic deformation; and a stopper portion (37) that restricts movement of the seal ring (15), wherein the movable arm portion (30) has a fulcrum portion (31) and a displacement portion (32), the displacement portion (32) projects from the fulcrum portion (31) and is displaceable in a direction intersecting the projecting direction, and the stopper portion (37) projects from the displacement portion (32).

Description

Connector with a locking member

Technical Field

The present disclosure relates to connectors.

Background

Patent document 1 discloses a connector in which a lock arm is formed in a hood portion of a connector housing, and a fitted state with a mating connector is maintained by the lock arm. A seal ring is provided on the inner wall surface of the cover portion, and the seal ring is prevented from falling off by a fall-off prevention surface formed on the rear end portion of the lock arm.

Documents of the prior art

Patent literature

Patent document 1: japanese patent laid-open publication No. 2016-131133

Disclosure of Invention

Problems to be solved by the invention

The anti-drop surface formed at the rear end of the lock arm is in a step-like protruding form from the inner wall surface of the cover portion. Therefore, the area of the cover portion where the slip-off preventing surface is formed, that is, the radial dimension of the rear end portion of the lock arm increases by the amount of the slip-off preventing surface formed. Since the rear end portion of the lock arm is a portion serving as a deflection fulcrum of the lock arm, the lock arm is less likely to be elastically deformed due to the increased rigidity of the deflection fulcrum of the lock arm by forming the escape prevention surface. Therefore, when the counterpart connector fitted to the cover portion comes into contact with the lock arm and elastically deforms the lock arm, frictional resistance increases.

The connector of the present disclosure is completed based on the above-described situation, and aims to avoid the movable arm portion from becoming difficult to flex.

Means for solving the problems

The connector of the present disclosure has:

a connector housing capable of being fitted to the counterpart housing;

a seal ring fitted to a peripheral surface of the connector housing and sealing a gap between the seal ring and a peripheral surface of the counterpart housing;

a movable arm portion capable of elastic deformation, formed in the connector housing; and

a stopper portion that restricts movement of the seal ring,

the movable arm portion has a fulcrum portion and a displacement portion that projects from the fulcrum portion and is displaceable in a direction intersecting the projecting direction,

the stopper is configured to protrude from the displacement portion.

Effects of the invention

According to the present disclosure, it can be avoided that the movable arm portion becomes difficult to flex.

Drawings

Fig. 1 is a side sectional view of the connector of embodiment 1.

Fig. 2 is a front view showing a state where the front member and the seal ring are detached from the housing main body.

Fig. 3 is a side sectional view showing a state in which the movable arm portion is elastically deformed.

Fig. 4 is an enlarged side sectional view of a part of fig. 3.

Fig. 5 is a side cross-sectional view showing a state in which the connector housing and the mating housing are fitted to each other and the movable arm portion is elastically restored.

Detailed Description

[ description of embodiments of the present disclosure ]

First, embodiments of the present disclosure will be described.

The connector of the present disclosure is provided with a connector,

(1) comprising: a connector housing capable of being fitted to the counterpart housing; a seal ring fitted to a peripheral surface of the connector housing and sealing a gap between the seal ring and a peripheral surface of the counterpart housing; a movable arm portion capable of elastic deformation, formed in the connector housing; and a stopper portion that restricts movement of the seal ring, wherein the movable arm portion has a fulcrum portion and a displacement portion that projects from the fulcrum portion and is displaceable in a direction intersecting the projecting direction, and the stopper portion projects from the displacement portion. In the case where the stopper portion is in a form protruding from the fulcrum portion of the movable arm portion as in patent document 1, the fulcrum portion becomes thick, and the rigidity of the fulcrum portion increases, so that the movable arm portion becomes difficult to flex. In contrast, the stopper portion of the present disclosure is formed only in the displacement portion of the movable arm portion, and therefore, the fulcrum portion can be made thin and the rigidity of the fulcrum portion can be suppressed low. This prevents the movable arm portion from becoming hard to bend.

(2) Preferably, the stopper portion is formed only in a region of the displacement portion separated from the fulcrum portion. According to this configuration, the influence of the increase in rigidity due to the formation of the stopper portion is less likely to be exerted on the fulcrum portion.

(3) In the aspect (2), it is preferable that the stopper is disposed at a distance from the fulcrum in the extending direction of the displacement portion. According to this configuration, the influence of the increase in rigidity due to the formation of the stopper portion is less likely to be exerted on the fulcrum portion.

(4) In the aspect (3), it is preferable that an opposing surface of the stopper portion opposing the seal ring is inclined so as to approach the seal ring as it goes toward a protruding direction of the stopper portion. According to this configuration, when the seal ring is pressed by the facing surface of the stopper, the seal ring enters so as to be pushed into the space defined by the displacement portion and the facing surface. This makes it difficult for the seal ring to separate from the peripheral surface of the connector housing, and therefore, the seal ring has excellent sealing performance.

(5) In the above (4), it is preferable that a displacement direction of the displacement portion when the movable arm portion is elastically deformed from a free state in which the movable arm portion is not elastically deformed is a direction in which the facing surface is separated from the seal ring. According to this configuration, the stopper portion can be prevented from being pushed into the seal ring when the movable arm portion is elastically deformed.

(6) Preferably, the connector housing is provided with a positioning member that is movable between a 1 st position for positioning a distal end portion of a projecting piece of the male terminal fitting and a 2 nd position for positioning a proximal end portion of the projecting piece, the movable arm portion is capable of holding the positioning member at the 1 st position, and the counterpart housing elastically deforms the movable arm portion and is detached from the positioning member during fitting of the counterpart housing. According to this configuration, the fitting force required to elastically deform the movable arm portion can be reduced in the process of fitting the mating housing.

[ details of embodiments of the present disclosure ]

[ example 1]

Embodiment 1 embodying the connector of the present disclosure is explained with reference to fig. 1 to 5. The present invention is not limited to these examples, and the claims are intended to cover all modifications within the meaning and scope equivalent to the claims. As shown in fig. 3 and 5, the connector of embodiment 1 includes a female-side connector F and a male-side connector M. The female-side connector F is a female-side connector in which a plurality of female terminal fittings 41 are housed in a female-side housing 40.

In embodiment 1, the left side in fig. 1, 3 to 5 is defined as the front side with respect to the front-rear direction of the male-side connector M. The vertical direction is defined as the upper and lower directions in the same manner as the directions shown in fig. 1 to 5. The left-right direction is defined as left and right directions as it is in fig. 2.

The male-side connector M includes a male-side housing 10, a male terminal fitting 18, a collective rubber plug 23, and a positioning member 25. The male housing 10 includes a housing body 11 made of synthetic resin and a hood-shaped front member 12 assembled to a front end portion of the housing body 11. A cylindrical seal portion 13 continuous over the entire circumference is formed at the front end portion of the housing main body 11. As shown in fig. 2, the sealing portion 13 is formed in a rectangular shape elongated in the left-right direction as a whole, and in detail, in a rectangular shape with four corners formed in a quarter-arc shape, when viewed from the front of the housing body 11.

As shown in fig. 1, a seal ring 15 is fitted to an inner peripheral surface of the seal portion 13. The seal ring 15 is inserted into the seal portion 13 from the front of the housing main body 11. The dimension of the seal ring 15 in the front-rear direction is larger than the dimension of the seal ring 15 in the radial direction (thickness direction). The seal ring 15 liquid-tightly seals between the inner peripheral surface of the housing main body 11 and the outer peripheral surface of the female housing 40.

A plurality of cavities 16 are formed in the housing main body 11 at intervals in the left-right direction. The cavity 16 is disposed rearward of the seal portion 13. A male terminal fitting 18 is inserted into each cavity 16 from the rear of the housing body 11. The male terminal fitting 18 is elongated in the front-rear direction as a whole. The male terminal fitting 18 has a square tubular terminal body 19, a projecting piece 20 projecting forward from the terminal body 19, and an open tubular pressure-bonding section 21 connected to a rear end of the terminal body 19. The crimp portion 21 is fixed with a tip end portion of the electric wire 22. The electric wire 22 is led out to the rear of the male housing 10 through a collective rubber plug 23 attached to the rear end of the housing body 11.

A positioning member 25 is housed in the housing main body 11. The positioning member 25 is movable between a 1 st position (see fig. 1, 3, and 4) and a 2 nd position (see fig. 5) rearward of the 1 st position in front of the cavity 16. The positioning member 25 is formed with a plurality of positioning holes 26 through which the plurality of projecting pieces 20 are individually inserted. In a state where the positioning member 25 is at the 1 st position, the tip end portion (front end portion) of the protruding piece 20 is positioned by the positioning hole 26. In a state where the positioning member 25 is at the 2 nd position, the base end portion (rear end portion) of the tab 20 is positioned by the positioning hole 26. A pair of projections 27 are formed on the upper and lower end edges of the positioning member 25.

The housing body 11 is formed with a pair of vertically symmetrical movable arm portions 30 projecting rearward from the rear end portion of the seal portion 13 in a cantilevered manner. The pair of movable arm portions 30 are disposed at the center in the lateral direction of the upper wall portion and the lower wall portion constituting the seal portion 13. The movable arm portion 30 is disposed in a region rearward of the seal portion 13 and the seal ring 15 and forward of the cavity 16 in the front-rear direction.

The movable arm portion 30 includes a fulcrum portion 31 connected to the rear end of the seal portion 13, and a displacement portion 32 cantilevered rearward from the fulcrum portion 31. The fulcrum portion 31 is located on the outer peripheral surface portion of the rear end of the seal portion 13. The displacement portion 32 is always held at the locking position in the front-rear direction (the direction parallel to the fitting direction of the female connector F with respect to the male connector M) (see fig. 1 and 5). The movable arm portion 30 is elastically deformable so as to displace the displacement portion 32 to an unlocking position (see fig. 3 and 4) radially outward of the locking position (upward in the upper movable arm portion 30 in fig. 1, 3, and 4). When the displacement portion 32 is displaced to the unlocking position, the displacement portion 32 is inclined obliquely toward the outer surface side of the movable arm portion 30 (the upper surface side of the upper movable arm portion 30 in fig. 1, 3, and 4) about the fulcrum portion 31.

As shown in fig. 4, a locking projection 34 is formed on the projecting end (rear end) of the displacement portion 32 so as to project from the inner surface of the displacement portion 32 toward the inner peripheral side (the side opposite to the displacement direction in which the displacement portion 32 is displaced toward the locking release position). A bulging portion 35 is formed on the inner surface of the displacement portion 32 at a position forward of the locking projection 34 so as to project toward the inner surface. The thickness dimension of the bulge portion 35 in the displacement direction (radial direction) of the displacement portion 32 is larger than the base end portion of the displacement portion 32 (i.e., the tip end portion closer to the fulcrum portion 31), and is larger than the tip end portion of the displacement portion 32 (i.e., the portion where the locking projection 34 is formed). An interfered portion 36 protruding toward the inner surface side from the front end side portion of the bulging portion 35 is formed in the rear end side region of the inner surface of the bulging portion 35.

The protruding portion 35 functions as a stopper 37 at a position forward of the interfered portion 36. The stopper 37 protrudes in a step-like manner toward the inner surface side (the direction approaching the female terminal part 41) with respect to the inner peripheral surface of the seal portion 13. The stopper 37 is disposed only at the displacement portion 32 of the movable arm portion 30. The front end 37F of the stopper 37 is located rearward of the front end of the displacement portion 32, i.e., rearward of the fulcrum portion 31. The stopper portion 37 and the fulcrum portion 31 are in a positional relationship with a space in the extending direction (i.e., the front-rear direction) of the displacement portion 32.

The stopper 37 is disposed so as to face the rear end portion of the seal ring 15 in the front-rear direction. The front end surface of the stopper 37 (the facing surface 38 facing the rear end surface of the seal ring 15 in the front-rear direction) is inclined with respect to the front-rear direction (the fitting direction of the male housing 10 and the counter housing). That is, the direction in which the facing surface 38 protrudes from the inner surface of the displacement portion 32 toward the stopper portion 37 (the vertical direction in fig. 4) is inclined such that the facing distance between the facing surface 38 and the rear end surface of the seal ring 15 in the front-rear direction is narrowed.

In a state where the rear end surface of the seal ring 15 in a state where the seal ring 15 is not elastically deformed is in contact with the front end portion of the stopper 37 in a state where the movable arm portion 30 is not elastically deformed, a space S is secured between the inclined facing surface 38 of the stopper 37 and the rear end surface of the seal ring 15. This space S is a space into which the rear end portion of the seal ring 15 enters while being elastically deformed in a wedge shape when the seal ring 15 moves rearward.

When the movable arm portion 30 is in a free state without elastic deformation, the rear end 38R of the facing surface 38 of the stopper portion 37 (a portion of the facing surface 38 that is connected to the inner surface of the displacement portion 32 at an acute angle) is positioned rearward (forward in the extending direction of the movable arm portion 30) of the fulcrum portion 31. Since the facing surface 38 of the stopper 37 is inclined with respect to the front-rear direction, the front end 37F of the stopper 37 (the portion of the facing surface 38 that is farthest from the inner surface of the displacement portion 32) is disposed at the same position as the fulcrum portion 31 in the front-rear direction and at a position forward of the rear end 38R of the facing surface 38 of the stopper 37.

In a state where the male-side connector M and the female-side connector F are disengaged, the locking projection 34 of the movable arm portion 30 is locked to the projection portion 27 of the positioning member 25, and the positioning member 25 is held at the 1 st position. The tab 20 of the male terminal fitting 18 is positioned by passing through the positioning hole 26. When the female-side connector F and the male-side connector M are fitted to each other in this state, the female-side housing 40 is inserted into the front member 12 and fitted to the inner circumferential surface of the seal ring 15 while sliding against each other. At this time, the seal ring 15 is relatively moved rearward (rightward in fig. 3 to 5) with respect to the male housing 10 by a pressing force from the front end portion of the female housing 40 in the fitting direction and a frictional resistance with the outer peripheral surface of the female housing 40.

However, since the rear end portion of the seal ring 15 contacts the facing surface 38 of the stopper 37, the seal ring 15 is not largely displaced rearward. When the seal ring 15 is pressed rearward, the rear end portion of the seal ring 15 is pushed into the space S secured between the facing surface 38 in a wedge shape while being elastically deformed. By this intrusion, displacement of the rear end portion of the seal ring 15 to the inner circumferential surface side is regulated. Therefore, the rear end portion of the seal ring 15 does not fall off the stopper 37, and the stopper 37 can reliably prevent the misalignment.

In the process of fitting the female housing 40, the pair of upper and lower releasing engagement portions 42 formed at the distal end portion in the fitting direction of the female housing 40 interfere with the interfered portion 36 of the movable arm portion 30. By this interference, the movable arm portion 30 is elastically deformed, and the displacement portion 32 is displaced from the locking position to the unlocking position. When the displacement portion 32 is displaced to the unlocking position, the locking projection 34 is disengaged from the projection portion 27, so that the positioning member 25 can be moved from the 1 st position to the 2 nd position. The female housing 40 abuts on the front surface of the positioning member 25 after the displacement portion 32 is displaced to the unlocking position.

When the movable arm portion 30 is elastically deformed, the displacement portion 32 is displaced so as to be inclined with the fulcrum portion 31 as a fulcrum. The thickness of the bulging portion 35 of the displacement portion 32, in which the stopper 37 is formed, in the displacement direction of the displacement portion 32 is large. The thickness dimension of the fulcrum portion 31 of the movable arm portion 30 is smaller than the thickness dimension of the bulging portion 35. Therefore, the rigidity of the fulcrum portion 31 is lower than that of the movable arm portion 30 at the portion where the stopper portion 37 is formed. Thereby, fitting resistance due to interference of the interfered portion 36 and the female housing 40 is suppressed to be low.

When the displacement portion 32 is displaced to the unlocking position, the displacement portion 32 assumes an inclined posture, and therefore the facing surface 38 is separated forward from the rear end portion of the seal ring 15. Therefore, the stopper 37 does not intrude into the rear end portion of the seal ring 15 accompanying the displacement of the displacement portion 32. Even in a state where the displacement portion 32 is displaced to the unlocking position, the facing surface 38 maintains a positional relationship facing the rear end surface of the seal ring 15 from the front in the front-rear direction. Therefore, even if the seal ring 15 is displaced rearward due to frictional resistance with the female housing 40, the seal ring 15 is brought into contact with the facing surface 38, and further forward displacement is restricted. Thus, the seal ring 15 is kept in close contact with the inner peripheral surface of the seal portion 13 without moving integrally with the female housing 40.

Further, since the releasing locking portion 42 is formed in a projecting shape, when the releasing locking portion 42 passes through the interfered portion 36, the displacement portion 32 is restored from the releasing locking position to the locking position by the elastic restoring force of the movable arm portion 30. By this restoring operation, the facing surface 38 approaches the rear end portion of the seal ring 15, so the seal ring 15 is not moved integrally with the female housing 40, and is held in close contact with the inner peripheral surface of the seal portion 13.

When the female-side connector F is fitted after the female-side housing 40 comes into contact with the front surface of the positioning member 25, the positioning member 25 and the female-side housing 40 are pushed together, and accordingly, the penetration portion of the protruding piece 20 penetrating the positioning hole 26 moves from the front end portion to the rear end portion of the protruding piece 20. When the female connector F and the male connector M are normally fitted to each other, the male terminal fitting 18 and the female terminal fitting 41 are connected to each other.

The connector of embodiment 1 includes a male housing 10 and a seal ring 15 that can be fitted to a female housing 40. The seal ring 15 is fitted to the inner peripheral surface of the male housing 10 to seal the outer peripheral surface of the female housing 40. The male housing 10 is formed with an elastically deformable movable arm portion 30. The movable arm portion 30 has a fulcrum portion 31 and a displacement portion 32, and the displacement portion 32 projects rearward from the fulcrum portion 31 and is displaceable to an outer surface side intersecting the projecting direction. The male housing 10 includes a stopper 37 for restricting the rearward movement of the seal ring 15. The stopper 37 protrudes from the displacement portion 32.

Unlike the present embodiment, in the case where the stopper portion is in a form protruding from the fulcrum portion of the movable arm portion, the fulcrum portion becomes thick, and the rigidity of the fulcrum portion increases, so that the movable arm portion becomes difficult to flex. In contrast, since the stopper 37 of the present embodiment is formed only in the displacement portion 32 of the movable arm portion 30, the fulcrum portion 31 can be made thin and the rigidity of the fulcrum portion 31 can be suppressed low. This prevents the movable arm 30 from becoming hard to bend.

The stopper portion 37 is formed only in a region separated from the fulcrum portion 31 in the displacement portion 32. The stopper 37 is disposed at a distance from the fulcrum 31 in the extending direction (front-rear direction) of the displacement portion 32. This makes it difficult for the influence of the increase in rigidity of the displacement portion 32 formed with the stopper 37 to reach the fulcrum portion 31.

The surface 38 of the stopper 37 facing the seal ring 15 is inclined so as to approach the seal ring 15 in the direction of projection of the stopper 37. According to this configuration, when the seal ring 15 is pressed by the facing surface 38 of the stopper 37, the seal ring 15 enters so as to be pushed into the space S defined by the displacement portion 32 and the facing surface 38. This makes it difficult for the seal ring 15 to separate from the peripheral surface of the male housing 10, and therefore, the seal performance is excellent.

The displacement direction of the displacement portion 32 when the movable arm portion 30 is elastically deformed from the free state without elastic deformation is a direction in which the facing surface 38 is separated forward from the seal ring 15. According to this configuration, when the movable arm portion 30 is elastically deformed, the stopper portion 37 can be prevented from being pushed into the seal ring 15.

A positioning member 25 is fitted to the male-side housing 10, and the positioning member 25 is movable between a 1 st position at which a tip end portion of the projecting piece 20 of the male terminal fitting 18 is positioned and a 2 nd position at which a base end portion of the projecting piece 20 is positioned. The movable arm 30 can hold the positioning member 25 at the 1 st position. In the process of fitting the female housing 40 to the male housing 10, the female housing 40 elastically deforms the movable arm 30 and separates from the positioning member 25. At this time, since the rigidity of the fulcrum portion 31 is reduced as described above, the fitting force required to elastically deform the movable arm portion 30 can be reduced in the process of fitting the female housing 40.

[ other examples ]

The present invention is not limited to the embodiments described above and illustrated in the drawings, but is defined by the claims. The present invention is intended to include all modifications within the meaning equivalent to the claims and the scope of protection, and also includes the following embodiments.

In the connector of the above embodiment, the seal ring is disposed on the inner peripheral surface of the connector housing, and the movable arm portion is elastically displaced toward the outer peripheral surface side of the connector housing, but the present invention is also applicable to a connector in which: a connector in which the seal ring is disposed on the inner peripheral surface and the movable arm portion is elastically displaced toward the inner peripheral side; a connector in which the seal ring is disposed on the outer peripheral surface and the movable arm portion is elastically displaced toward the inner peripheral side; and a connector in which the seal ring is disposed on the outer peripheral surface and the movable arm portion is elastically displaced toward the outer peripheral surface.

The stopper portion of the above embodiment prevents the movement of the seal ring when the mating housing is fitted, but the stopper portion may prevent the movement of the seal ring when the mating housing is removed.

The movable arm portion of the above embodiment is used to hold the positioning member at the 1 st position, but the movable arm portion may also be used to lock the connector housing and the counterpart housing in the fitted state.

In the above embodiment, the stopper portion is formed only in the region of the displacement portion separated forward from the fulcrum portion, but the stopper portion may be formed in a region of the displacement portion adjacent to the fulcrum portion.

In the above embodiment, the stopper portion and the fulcrum portion are disposed with a space in the extending direction (front-rear direction) of the displacement portion, but the stopper portion and the fulcrum portion may be disposed with a space in a direction intersecting the extending direction of the displacement portion.

In the above embodiment, the stopper portion projects in the displacement direction of the displacement portion, but the stopper portion may project in a direction intersecting both the extending direction of the displacement portion and the displacement direction of the displacement portion.

In the above-described embodiment, the facing surface of the stopper portion facing the seal ring is inclined so as to be closer to the seal ring in the protruding direction toward the stopper portion, but the facing surface of the stopper portion facing the seal ring may be inclined so as to be farther from the seal ring in the protruding direction toward the stopper portion, or may be a plane in which the facing interval with the seal ring does not change, for example.

In the above embodiment, the displacement portion is displaced in the direction of separating the stopper portion from the seal ring when the movable arm portion is elastically deformed, but the displacement portion may be displaced in the direction of approaching the stopper portion to the seal ring when the movable arm portion is elastically deformed.

Description of the reference numerals

F: female-side connector

M: male side connector

S: space(s)

10: sunny side shell (connector shell)

11: casing main body

12: front component

13: sealing part

15: sealing ring

16: chamber

18: male terminal fitting

19: terminal body

20: projecting piece

21: crimping part

22: electric wire

23: general rubber bolt

25: positioning member

26: locating hole

27: projecting part

30: movable arm

31: fulcrum part

32: displacing part

34: locking projection

35: bulge part

36: interfered part

37: stopper part

37F: front end

38: opposed surfaces

38R: back end

40: female side shell (the other side shell)

41: female terminal part

42: releasing the locking part

Claims (6)

1. A connector, having:

a connector housing capable of being fitted to the other side housing;

a seal ring fitted to a peripheral surface of the connector housing and sealing a gap between the peripheral surface of the connector housing and a peripheral surface of the mating housing;

a movable arm portion capable of elastic deformation, formed in the connector housing; and

a stopper portion that restricts movement of the seal ring,

the movable arm portion has a fulcrum portion and a displacement portion that projects from the fulcrum portion and is displaceable in a direction intersecting the projecting direction,

the stopper is configured to protrude from the displacement portion.

2. The connector according to claim 1, wherein the stopper portion is formed only in a region separated from the fulcrum portion in the displacement portion.

3. The connector according to claim 2, wherein the stopper portion is arranged with a space from the fulcrum portion in the extending direction of the displacement portion.

4. The connector according to claim 3, wherein an opposing surface of the stopper portion opposing the seal ring is inclined so as to approach the seal ring more toward a protruding direction of the stopper portion.

5. The connector according to claim 4, wherein a displacement direction of the displacement portion when the movable arm portion is elastically deformed from a free state without elastic deformation is a direction in which the opposing surface is away from the seal ring.

6. The connector according to any one of claims 1 to 5, wherein a positioning member is fitted to the connector housing, the positioning member being movable between a 1 st position at which a tip end portion of a tab of a male terminal fitting is positioned and a 2 nd position at which a base end portion of the tab is positioned,

the movable arm can hold the positioning member in the 1 st position,

in the process of fitting the mating housing, the mating housing elastically deforms the movable arm portion and is separated from the positioning member.

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